Use scroll-boundary-behavior to control overscroll-refresh/glow on android.

content/browser/android/overscroll_controller_android.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
 #define CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_
 
 #include <memory>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/time/time.h"
+#include "content/common/content_export.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "ui/android/overscroll_glow.h"
 #include "ui/android/overscroll_refresh.h"
 #include "ui/gfx/geometry/vector2d_f.h"
 
 namespace blink {
 class WebGestureEvent;
 }
 
 namespace cc {
 class CompositorFrameMetadata;
 class Layer;
 }
 
 namespace ui {
 class WindowAndroidCompositor;
 struct DidOverscrollParams;
 }
 
 namespace content {
 
 // Glue class for handling all inputs into Android-specific overscroll effects,
 // both the passive overscroll glow and the active overscroll pull-to-refresh.
 // Note that all input coordinates (both for events and overscroll) are in DIPs.
-class OverscrollControllerAndroid : public ui::OverscrollGlowClient {
+class CONTENT_EXPORT OverscrollControllerAndroid
+    : public ui::OverscrollGlowClient {
  public:
   OverscrollControllerAndroid(
       ui::OverscrollRefreshHandler* overscroll_refresh_handler,
       ui::WindowAndroidCompositor* compositor,
       float dpi_scale);
+
+  static std::unique_ptr<OverscrollControllerAndroid> CreateForTests(
+      ui::WindowAndroidCompositor* compositor,
+      float dpi_scale,
+      std::unique_ptr<ui::OverscrollGlow> glow_effect,
+      std::unique_ptr<ui::OverscrollRefresh> refresh_effect);
+
   ~OverscrollControllerAndroid() override;
 
   // Returns true if |event| is consumed by an overscroll effect, in which
   // case it should cease propagation.
   bool WillHandleGestureEvent(const blink::WebGestureEvent& event);
 
   // To be called upon receipt of a gesture event ack.
   void OnGestureEventAck(const blink::WebGestureEvent& event,
                          InputEventAckState ack_result);
 
   // To be called upon receipt of an overscroll event.
   void OnOverscrolled(const ui::DidOverscrollParams& overscroll_params);
 
   // Returns true if the effect still needs animation ticks.
   // Note: The effect will detach itself when no further animation is required.
   bool Animate(base::TimeTicks current_time, cc::Layer* parent_layer);
 
   // To be called whenever the content frame has been updated.
   void OnFrameMetadataUpdated(const cc::CompositorFrameMetadata& metadata);
 
   // Toggle activity of any overscroll effects. When disabled, events will be
   // ignored until the controller is re-enabled.
   void Enable();
   void Disable();
 
  private:
+  // This method should only be called from CreateForTests.
+  OverscrollControllerAndroid(
+      ui::WindowAndroidCompositor* compositor,
+      float dpi_scale,
+      std::unique_ptr<ui::OverscrollGlow> glow_effect,
+      std::unique_ptr<ui::OverscrollRefresh> refresh_effect);
+
   // OverscrollGlowClient implementation.
   std::unique_ptr<ui::EdgeEffectBase> CreateEdgeEffect() override;
 
   void SetNeedsAnimate();
 
   ui::WindowAndroidCompositor* const compositor_;
   const float dpi_scale_;
 
   bool enabled_;
 
   // TODO(jdduke): Factor out a common API from the two overscroll effects.
   std::unique_ptr<ui::OverscrollGlow> glow_effect_;
   std::unique_ptr<ui::OverscrollRefresh> refresh_effect_;
 
   DISALLOW_COPY_AND_ASSIGN(OverscrollControllerAndroid);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_ANDROID_OVERSCROLL_CONTROLLER_ANDROID_H_